Properties of the Number -31891

Thirty-One Thousand Eight Hundred Ninety-One

Basics

Value: -31892 → -31891 → -31890

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 31891

Divisors: 1, 31891

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111110010010011

Octal: -76223

Duodecimal: -16557

Hexadecimal: -7c93

Square: 1017035881

Square Root: 178.58051405458548

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Number of magic labelings of the prism graph I X C₅ with magic sum n. A244497

T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly three ways, and new values 0..2 introduced in row major order. A204370

Primes that are the first in a run of exactly 4 emirps. A346024

Output of the linear congruential pseudo-random number generator rand() used in Microsoft's Visual C++. A96558

Primes p such that primorial(p)/2 - 2 is prime. A96547

Group the natural numbers so that the n-th group contains n numbers whose sum as well as the group product +1 is prime. Sequence contains the primes arising as the sum of the terms of groups. A92946

Primes of the form 7·p²+7·p-1 (with p=prime). A171138

Primes p such that both 2p-1 and 2p²-2p+1 are prime. A274609

a(n) = smallest prime q such that ∑_{primes p <= q} 1/sqrt(p) >= n. A292775

Lexicographically smallest sequence of distinct primes whose inverse binomial transform consists only of primes. A384674